9721422 has 12 divisors (see below), whose sum is σ = 21063120. Its totient is φ = 3240468.

The previous prime is 9721421. The next prime is 9721423. The reversal of 9721422 is 2241279.

It is an interprime number because it is at equal distance from previous prime (9721421) and next prime (9721423).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9721421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 270022 + ... + 270057.

It is an arithmetic number, because the mean of its divisors is an integer number (1755260).

Almost surely, 2^9721422 is an apocalyptic number.

9721422 is an abundant number, since it is smaller than the sum of its proper divisors (11341698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9721422 is a wasteful number, since it uses less digits than its factorization.

9721422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540087 (or 540084 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 9721422 is about 3117.9194986401. The cubic root of 9721422 is about 213.4240049683.

The spelling of 9721422 in words is "nine million, seven hundred twenty-one thousand, four hundred twenty-two".